How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask George Your Own Question

George
George, BMW Technician
Category: BMW
Satisfied Customers: 1861
Experience:  BMW Master Technician over 20 years BMW Dealership Experience. BMW Auto Repair Shop Business Owner
8183308
Type Your BMW Question Here...
George is online now
A new question is answered every 9 seconds

I have an A/C issue with my 1999 BMW 323i. Cold air would not

Customer Question

I have an A/C issue with my 1999 BMW 323i. Cold air would not blow through the vents unless I drove the car (or revved the engine) to about 2K RPM's. Once on the road the A/C seemd to be fine. However, at times the cold air would stop working and only outside air would come through the vents.

A month ago I took my car to my local BMW dealershp and they replaced the pump (condenser unit)? This seemed to work for a short while. I'm noticing again that when I start my car and sit at idle, cold air is again not coming through the vents. When I get on the road, cold air is blowing again. Note: For grins I tried to put the heat on while idling. Only outside air came through the vents, the air was not hot. Only when I revved the engine did the hot air start blowing.

The mechanic said that the clutch seemed to be working fine and that my problem was the pump. Any help would be appreciated. Thanks.
Submitted: 4 years ago.
Category: BMW
Expert:  George replied 4 years ago.
Chat Conversation Started
George :

Can I have the last 7 digits of your VIN #

Customer :

A81611

Customer :

CA81611

George :

Which one is it?

George :

Never mind

George :

Give me 1 moment and I will get right back to you.

Customer :

Ok. Miles on my car: 116K

Customer :

Another note: The dealership took 2 days to determine that I needed a new condenser unit. I didn't get the sense that the mechanic was as qualified as he should have been. It almost seemed that he was guessing at the issue.

George :

I am going to switch us over from Chat to Q&A this way I can post some pictures, if it states I disconnected just ignore that. I am still here and you will be able to continue as normal. Let me know when you are ready.

Customer :

I'm ready.

Expert:  George replied 4 years ago.
What Happens Now?

Your chat has ended, but you can still work with your Expert to get an answer to your question if you have not yet received one.

Come back to this page at any time to see additional information from your Expert.  You will also receive an email when your question is updated.  If you want to send a message to your Expert, use the box below.

If you have already received a satisfactory answer to your question, click the Accept button above.  Experts are credited for each accepted answer they provide.
Expert:  George replied 4 years ago.
It does sound as if he was guessing.
Expert:  George replied 4 years ago.

I am still here but will be typing an explanation which might take a few minutes

Customer: replied 4 years ago.
ok. Thanks.
Expert:  George replied 4 years ago.

The a/c system uses 2 separate fans during normal operation. The 1st 1 is used either with or without the a/c on, and this is the fan which I am leaning towards being your problem. Let me explain:

This fan is controlled by what is called a fan clutch and it is used to cool the radiator during normal operation, when the temperature reaches a certain temperature in front of the radiator this fan clutch has a bi-metallic strip which will expand or contract depending on temperature. When it is heated in will close off a chamber in the fan clutch will will make it go from the fan just free wheeling to the fan locking up and when it locks up it cools down the area in front of the radiator. It works this way to save on fuel and engine load that is why it is not engaged all the time. Over time the oil that is inside of the fan clutch will leak out and the fan clutch will not lock up fully.

In order for the a/c to be efficient at idle it uses this fan and the other fan which is called the auxiliary fan to remove the heat from in front of the a/c condenser and the radiator. As long as this heat is not being removed it will blow warm or hot air from the vents.

And once you are driving the airflow will remove the heat this is why it cools down when you drive and it works normal. And when you rev it up to 2000 rpm's at idle there might be enough oil left in the fan clutch to engage the fan just enough to remove some heat.

So you will need to have the fan clutch checked for proper operation and also the auxiliary fan. Most likely you will need to replace the fan clutch.

________

 

If I have answered your question I ask that you please accept.

George, BMW Technician
Category: BMW
Satisfied Customers: 1861
Experience: BMW Master Technician over 20 years BMW Dealership Experience. BMW Auto Repair Shop Business Owner
George and 4 other BMW Specialists are ready to help you
Customer: replied 4 years ago.

That makes sense. Any idea on cost to replace the fan clutch?

 

Expert:  George replied 4 years ago.

Yes I can give you the part # XXXXX with the prices, but since I answered you original question you would need to accept my answer. And then I would be more then happy to answer any follow up questions.

_________

 

I will always leave positive feedback all I ask is for the same.

Expert:  George replied 4 years ago.
Thank you very much give me a few moments to look everything up and I will get right back to you.
Expert:  George replied 4 years ago.

Item # XXXXX is the Fan Clutch in the diagram. Depending on your dealership the average labor time to replace it is 1.0 hour. The price below for the part is a national average so your dealers price may vary.

 

 

Parts diagram
No. Description Supplement Qty From Up To Part Number Price Notes
For vehicles with
Automatic transmission

S205A=Yes
01Fan 11 bladeD=420MM110/199811521712058$60.90+core
02FAN COUPLING110/199811527505302$202.21
03Fillister-head screwM6X16-ZNS310/199807119901438$0.60
04Pulley111511436590$30.32
05Hex bolt with washerM6X16-Z1-ZNS407119900250ENDED

Notes

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
 
 
 

Meet The Experts:

 
 
 
  • Roger

    BMW Master Tech

    Satisfied Customers:

    2906
    10 yrs. experience as BMW Master Technician, shop foreman and dealer.
< Last | Next >
  • http://ww2.justanswer.com/uploads/Guest/2008-02-15_191551_avatar.jpg Roger's Avatar

    Roger

    BMW Master Tech

    Satisfied Customers:

    2906
    10 yrs. experience as BMW Master Technician, shop foreman and dealer.
  • http://ww2.justanswer.com/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    ASE Certified Technician

    Satisfied Customers:

    406
    ASE & Bosch Certified Master Tech. Over 30 years experience.
  • http://ww2.justanswer.com/uploads/DA/dansciol/2012-7-7_16177_danpic.64x64.jpeg bimmaster's Avatar

    bimmaster

    BMW Technician

    Satisfied Customers:

    1817
    3 years dealer experience, master bmw tech
  • http://ww2.justanswer.com/uploads/bmwmaster/2009-05-09_062111_avitar.jpg Sam's Avatar

    Sam

    BMW Master technician

    Satisfied Customers:

    1043
    BMW S.T.E.P. graduate, 10 years BMW dealership experience
  • http://ww2.justanswer.com/uploads/hondatrx450/2010-01-18_231606_stuff_092.JPG mike's Avatar

    mike

    BMW Technician

    Satisfied Customers:

    694
    bmw master tech ase certified
  • http://ww2.justanswer.com/uploads/CA/caprio23/2011-12-13_155550_20111213105344.64x64.jpg Anthony's Avatar

    Anthony

    BMW Technician

    Satisfied Customers:

    628
    ASE Master Automobile Technician with over 20 years exp. in this field.
  • http://ww2.justanswer.com/uploads/bmwbum01/2009-12-28_205712_germany2000.jpg Thebmwbum's Avatar

    Thebmwbum

    BMW Foreman

    Satisfied Customers:

    533
    31 years BMW Experience